Now we're getting somewhere even if it entails me having to start my 3D model from the beginning. From the image below you can see distinct differences between the shapes and dimensions I got off the screencaps and the reference drawing from The Spaceship Handbook. The images I used (posted upthread) were very close to dead on side elevation with little angle to the camera. That means not too much distortion in terms of length which I tried to take into account. The tail section is definitely longer and the forward section has a slightly different contour to it.